Site problems. Possibly ISP related?

Anyone having problem getting the site to load AND using Suddenlink internet? I have them for my Internet (and I hate it but it's my only option) and I can not access the site on ANY of my devices when I'm using the WiFi. I can use my phone just fine and any other WiFi I have tried works great, just mine at home that doesn't work.

The WiFi is password protected and I can't change the password or turn it off because of the modem/router they provided And there are ZERO settings I can change on the router.